Upload date
All time
Last hour
Today
This week
This month
This year
Type
All
Video
Channel
Playlist
Movie
Duration
Short (< 4 minutes)
Medium (4-20 minutes)
Long (> 20 minutes)
Sort by
Relevance
Rating
View count
Features
HD
Subtitles/CC
Creative Commons
3D
Live
4K
360°
VR180
HDR
522,770 results
We know that gravity must cause clocks to run slow on the basis of logical consistency. And we know that gravity DOES cause ...
2,856,883 views
3 years ago
There are four fundamental forces - the strong and weak nuclear forces, electromagnetism, and gravity. Except maybe gravity is ...
781,623 views
7 months ago
There's a deep connection between gravity and time - gravitational fields seem to slow the pace of time in what we call ...
1,338,272 views
What if there is no such thing as dark matter? What if our understanding of gravity is just wrong? New work is taking another shot ...
2,372,911 views
It's been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire.
1,161,924 views
4 years ago
Most of us take gravity as an assumed part of our living realities, but why? Basic physics introduces us to the concept of gravity ...
3,157,261 views
9 years ago
The holy grail of theoretical physics is to find the long-sought theory of quantum gravity. But what if this theory is as mythical as the ...
572,588 views
3 months ago
Between them, general relativity and quantum mechanics seem to describe all of observable reality. You can further support us on ...
2,385,740 views
6 years ago
If we discover how to connect quantum mechanics with general relativity we'll pretty much win physics. There are multiple theories ...
459,907 views
2 months ago
The holy grail of theoretical physics is to come up with a quantum theory of gravity. But after a century of trying we really have no ...
1,667,071 views
1 year ago
We know that gravity exerts its pull on light, and we have an explanation for why. Actually, we have multiple explanations that all ...
587,956 views
Fact: in a black hole, all of the mass is concentrated at the singularity at the very center. Fact: every black hole singularity is ...
1,569,354 views
2 years ago
It's time we talked about loop quantum gravity. What exactly is it? What are the loops? And can it really defeat string theory in our ...
1,400,376 views
5 years ago
From hoverboards to flying cars to cloud cities, anti-gravity is a staple of science fiction and our dream of a less Earth-bound future ...
760,778 views
10 months ago
We've come a long way in our understanding of dark energy. In previous episodes we've looked at how our universe is ...
2,197,783 views
8 years ago
On November 29th, 20% off the whole merch store! https://www.pbsspacetime.com/shop Every good nerd knows that E=mc^2.
243,186 views
1 day ago
A few weeks ago a large team of gravitational wave astronomers announced something pretty wild. The moderately confident ...
585,201 views
Fermilab physicists really care about the mass of the W boson. They spent nearly a decade recording collisions in the Tevatron ...
1,623,031 views
Physics progresses by breaking our intuitions, but we're now at a point where further progress may require us to do away with the ...
1,925,928 views
Niels Bohr, a Danish Physicist said “Everything we call real is made of things that cannot be regarded .” Is what we see perceived ...
925,969 views